首页
外语
计算机
考研
公务员
职业资格
财经
工程
司法
医学
专升本
自考
实用职业技能
登录
外语
A blind baby is doubly handicapped. Not only is it unable to see, but because it cannot receive the visual stimulus from its env
A blind baby is doubly handicapped. Not only is it unable to see, but because it cannot receive the visual stimulus from its env
admin
2014-01-07
32
问题
A blind baby is doubly handicapped. Not only is it unable to see, but because it cannot receive the visual stimulus from its environment that a sighted child does, it is likely to be slow in intellectual development. Now the ten-month old son of Dr. and Mrs. Dennis Daughters is the subject of an unusual psychological experiment designed to prevent a lag in the learning process. With the aid of a sonar-type electronic that he wears on his head, infant Dennis is learning to identify the people and objects in the world around him by means of echoes.
The device is a refinement of the "Sonicguide", an instrument produced by Telesensory Systems, Inc., of Palo Alto, Calif., and used by blind adults in addition to a sane or guide dog. As adapted for Dennis, it consists of a battery-powered system about the size of a half dollar that is on a headgear. A transmitter emits an ultrasonic pulse that creates an 80 degree cone of sound at 6 feet. Echoes from objects within the cone are perceived as sounds that vary in pitch and volume with the size and distance of the object.
The closer an object is, the lower the pitch, and the larger the object, the louder the signal. Hard surfaces produce a sharp ping, while soft ones send back signals with a slightly fuzzy quality. An object slightly to the right of Denny’s sends back a louder sound to his right ear than to the left. Thus, by simply moving his head right and left and up and down, he can not only locate an object but also get some notion of its shape and size, thanks to the varying qualities of sounds reaching his ears as the cone of ultrasound passes
its edges
. Dennis likes to use the device to play a kind of peek-a-boo with his mother. Standing on her knee and facing her directly, he receives a strong signal in both ears. By turning his head away, he makes her seem to disappear. "From the first time he wore it," says Mrs. Daughters, "it was like a light going on in his head."
What remains to be determined is how well the device will help Dennis cope with his surroundings as he begins to walk and venture further into his environment. Meanwhile, Telesensory, Inc. is working on the development of sonar device with somewhat the same sensitivity as Dennis’s for use by school-age children.
Infant Dennis becomes the subject of the experiment most probably because
选项
A、he already lags behind the sighted children.
B、he leads a life as normal as any other children.
C、he is at the early stage of the learning process.
D、he has the aid of a sonar-type electronic device.
答案
C
解析
首段首句提到的a blind baby,第3句提到的ten—month old和末句提到的infant等词都表明Dennis成为研究对象是因为Daughters夫妇研究的是盲童从小的学习过程,Dennis年龄很小,正处于学习的最初阶段,符合Daughters夫妇做研究的条件,因此可推断本题应选C。
转载请注明原文地址:https://kaotiyun.com/show/FyFK777K
0
专业英语四级
相关试题推荐
Therelationshipbetweenemployersandemployeeshasbeenstudied______.
ThemanwantedthewomantobringthefollowingEXCEPT
Chinesee-commercecompanyAlibabaGroupplanstotakeitsHongKong-listedunitprivate,twosourcesfamiliarwiththematters
Don’tmisstheboat.Thatcompanyisquitefamous.Theunderlinedwordmeans______.
TheKalinagotribe,ontheislandofDominica,isundersomehistoricpopulationpressure.The【C1】______majorityoftheWestI
Anniversariesaretimesforreflection,andthisoneshouldbenoexception,forthe30-yearhistoryofAIDSisaminorinwhich
Untilthen,hisfamily______fromhimforsixmonths.
Inthe19thcentury,thereusedtobeamodelofhowtobeagoodperson.Thereareallthesetorrentsofpassionflowingthroug
AnAustralianresearchgroupmayeasehumanity’scollectiveconscienceoveraspateofprehistoricextinctionsonthesouthernc
Whenonespouseisdepressed,amarriageisdepressed.Thisillnesserodesemotionalandsexualintimacyandmakesarelationshi
随机试题
半解冻状态的肉比较有利于________。
在污水处理时基本都要有物理处理过程,因该过程能通过一定的反应除去水中的悬浮物。()
关于早、晚反应组织,错误的是
A.骨的缺血性坏死B.血管损伤C.神经损伤D.骨的延迟愈合E.骨筋膜室综合征距骨骨折易引起
关于苯二氮革类的叙述,哪项是错误的
A、 B、 C、 D、 E、 D
根据最新监管政策,商业银行对个人住房贷款客户的借款利率和首付款比例,应根据()区别核定。
中国资产阶级民主革命是由以孙中山为首的资产阶级革命派首先发动的,资产阶级革命派的骨干是
Sometwentyyearsago,theperformanceofgirlsandboysinclasswascompared.Boys【B1】______betterinexams,sovariousmeasur
HowYourLanguageAffectsYourWealthandHealth[A]Doesthelanguagewespeakdeterminehowhealthyandrichwewillbe?Newre
最新回复
(
0
)